A week of symfony #318 (28 January ->3 February 2013)

This week, the oficial Symfony2 repository surpassed the 2,000th fork milestone. Meanwhile, the stabilization of the Symfony 2.2 version continues in the newly created 2.2 branch. In addition, a new SymfonyCon Europe conference was announced for this year.

c72e471:
renamed some classes and Twig functions to more descriptive names (HttpContentRenderer now is FragmentHandler, RendererStrategy subnamespace now is Fragment, ProxyRouterListener now is FragmentListener and the router_proxy configuration entry has been renamed to fragments)